Function ejectEnum

Ejects enums from all files specified by target.

Rewrites each enum found in the target to the safer alternative. for example:

// before rewrite
enum YesNo {
  No,
  Yes,
}

// after rewrite
const YesNo = {
  No: 0,
  Yes: 1,
} as const;

type YesNo = typeof YesNo[keyof typeof YesNo];
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